Infiniti I30 (A33). Manual — part 171

UNDERBODY

NHBT0026S02

Measurement

NHBT0026S0201

SBT883

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BODY (ALIGNMENT)

Alignment (Cont’d)

BT-65

Measurement Points

NHBT0026S0202

SBT884

BODY (ALIGNMENT)

Alignment (Cont’d)

BT-66

ENGINE CONTROL SYSTEM

SECTION

EC

CONTENTS

TROUBLE DIAGNOSIS - INDEX . . . . . . . . . 8

Alphabetical & P No. Index for DTC . . . . . . ...8

PRECAUTIONS . . . . . . . . . . . . . . . .14

Supplemental Restraint System (SRS)

″

AIR

BAG

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and

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SEAT BELT PRE-TENSIONER

″

. . . .14

Precautions for On Board Diagnostic (OBD)
System of Engine and A/T. . . . . . . . . . .14
Engine Fuel & Emission Control System . . . . ..15
Precautions . . . . . . . . . . . . . . . . 16
Wiring Diagrams and Trouble Diagnosis. . . . ...17

PREPARATION . . . . . . . . . . . . . . . .18

Special Service Tools . . . . . . . . . . . . 18
Commercial Service Tools . . . . . . . . . . .18

ENGINE AND EMISSION CONTROL OVERALL
SYSTEM. . . . . . . . . . . . . . . . . . .20

Engine Control Component Parts Location. . . ...20
Circuit Diagram . . . . . . . . . . . . . . ..24
System Diagram . . . . . . . . . . . . . . 25
Vacuum Hose Drawing . . . . . . . . . . . ..26
System Chart . . . . . . . . . . . . . . . .27

ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION . . . . . . . . . . . ...28

Multiport Fuel Injection (MFI) System . . . . . ...28
Electronic Ignition (EI) System . . . . . . . . ..30
Air Conditioning Cut Control. . . . . . . . . ..31
Fuel Cut Control (at no load & high engine
speed) . . . . . . . . . . . . . . . . . . 32
Evaporative Emission System . . . . . . . . ...32
On Board Refueling Vapor Recovery (ORVR) . . ..38
Positive Crankcase Ventilation . . . . . . . . ..47

BASIC SERVICE PROCEDURE . . . . . . . . ...49

Fuel Pressure Release . . . . . . . . . . . ..49
Fuel Pressure Check . . . . . . . . . . . . .49
Fuel Pressure Regulator Check . . . . . . . . 50
Injector . . . . . . . . . . . . . . . . . ...51
How to Check Idle Speed and Ignition Timing. . ..52
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment . . . . . . . . . . . . . . . . .53
Idle Air Volume Learning . . . . . . . . . . ...66

ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION . . . . . . . . . . . . . . . ...68

Introduction . . . . . . . . . . . . . . . . 68
Two Trip Detection Logic . . . . . . . . . . ...68
Emission-related Diagnostic Information . . . . ...69
Malfunction Indicator Lamp (MIL). . . . . . . ..82
OBD System Operation Chart . . . . . . . . ...83
CONSULT-II . . . . . . . . . . . . . . . ...89
Generic Scan Tool (GST) . . . . . . . . . . 103

TROUBLE DIAGNOSIS - INTRODUCTION. . . . 105

Introduction . . . . . . . . . . . . . . . ..105
Work Flow. . . . . . . . . . . . . . . . 107

TROUBLE DIAGNOSIS - BASIC INSPECTION . . .109

Basic Inspection. . . . . . . . . . . . . ...109

TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION . . . . . . . . . . . . . . . .121

DTC Inspection Priority Chart. . . . . . . . ..121
Fail-safe Chart . . . . . . . . . . . . . . .122
Symptom Matrix Chart. . . . . . . . . . . .123
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 127
Major Sensor Reference Graph in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 130
ECM Terminals and Reference Value . . . . . .132

TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..140

Description . . . . . . . . . . . . . . . ...140
Testing Condition . . . . . . . . . . . . . .140
Inspection Procedure. . . . . . . . . . . ...140
Diagnostic Procedure . . . . . . . . . . . ..141

TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT. . . . . . . . . . . . . . . . . .144

Description . . . . . . . . . . . . . . . ...144
Diagnostic Procedure . . . . . . . . . . . ..144

TROUBLE DIAGNOSIS FOR POWER SUPPLY. . 145

Main Power Supply and Ground Circuit. . . . ..145

DTC P0100 MASS AIR FLOW SENSOR (MAFS). ..152

Component Description . . . . . . . . . . ...152
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 152

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On Board Diagnosis Logic. . . . . . . . . ...152
Possible Cause. . . . . . . . . . . . . . 153
DTC Confirmation Procedure . . . . . . . . ..153
Overall Function Check . . . . . . . . . . ...155
Wiring Diagram . . . . . . . . . . . . . . 156
Diagnostic Procedure . . . . . . . . . . . ..157

DTC P0105 ABSOLUTE PRESSURE SENSOR . . 160

Component Description . . . . . . . . . . ...160
On Board Diagnosis Logic. . . . . . . . . ...160
Possible Cause. . . . . . . . . . . . . . 160
DTC Confirmation Procedure . . . . . . . . ..160
Wiring Diagram . . . . . . . . . . . . . . 162
Diagnostic Procedure . . . . . . . . . . . ..163

DTC P0110 INTAKE AIR TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . ..166

Component Description . . . . . . . . . . ...166
On Board Diagnosis Logic. . . . . . . . . ...166
Possible Cause. . . . . . . . . . . . . . 166
DTC Confirmation Procedure . . . . . . . . ..166
Wiring Diagram . . . . . . . . . . . . . . 168
Diagnostic Procedure . . . . . . . . . . . ..169

DTC P0115 ENGINE COOLANT TEMPERATURE
SENSOR (ECTS) (CIRCUIT) . . . . . . . . . ...171

Component Description . . . . . . . . . . ...171
On Board Diagnosis Logic. . . . . . . . . ...171
Possible Cause. . . . . . . . . . . . . . 172
DTC Confirmation Procedure . . . . . . . . ..172
Wiring Diagram . . . . . . . . . . . . . . 173
Diagnostic Procedure . . . . . . . . . . . ..174

DTC P0120 THROTTLE POSITION SENSOR . . ...176

Description . . . . . . . . . . . . . . . ...176
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 176
On Board Diagnosis Logic. . . . . . . . . ...177
Possible Cause. . . . . . . . . . . . . . 177
DTC Confirmation Procedure . . . . . . . . ..177
Wiring Diagram . . . . . . . . . . . . . . 181
Diagnostic Procedure . . . . . . . . . . . ..182

DTC P0125 ENGINE COOLANT TEMPERATURE
SENSOR (ECTS) . . . . . . . . . . . . . . .187

Description . . . . . . . . . . . . . . . ...187
On Board Diagnosis Logic. . . . . . . . . ...187
Possible Cause. . . . . . . . . . . . . . 188
DTC Confirmation Procedure . . . . . . . . ..188
Wiring Diagram . . . . . . . . . . . . . . 189
Diagnostic Procedure . . . . . . . . . . . ..190

DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1
(FRONT) (CIRCUIT). . . . . . . . . . . . . .192

Component Description . . . . . . . . . . ...192
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 192
On Board Diagnosis Logic. . . . . . . . . ...192

Possible Cause. . . . . . . . . . . . . . 193
DTC Confirmation Procedure . . . . . . . . ..193
Overall Function Check . . . . . . . . . . ...194
Wiring Diagram . . . . . . . . . . . . . . 195
Diagnostic Procedure . . . . . . . . . . . ..197

DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1
(FRONT) (LEAN SHIFT MONITORING) . . . . . .202

Component Description . . . . . . . . . . ...202
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 202
On Board Diagnosis Logic. . . . . . . . . ...202
Possible Cause. . . . . . . . . . . . . . 203
DTC Confirmation Procedure . . . . . . . . ..203
Overall Function Check . . . . . . . . . . ...204
Diagnostic Procedure . . . . . . . . . . . ..204

DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1
(FRONT) (RICH SHIFT MONITORING) . . . . . ..210

Component Description . . . . . . . . . . ...210
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 210
On Board Diagnosis Logic. . . . . . . . . ...210
Possible Cause. . . . . . . . . . . . . . 211
DTC Confirmation Procedure . . . . . . . . .. 211
Overall Function Check . . . . . . . . . . ...212
Diagnostic Procedure . . . . . . . . . . . ..212

DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1
(FRONT) (RESPONSE MONITORING). . . . . ...218

Component Description . . . . . . . . . . ...218
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 218
On Board Diagnosis Logic. . . . . . . . . ...218
Possible Cause. . . . . . . . . . . . . . 219
DTC Confirmation Procedure . . . . . . . . ..219
Overall Function Check . . . . . . . . . . ...220
Wiring Diagram . . . . . . . . . . . . . . 221
Diagnostic Procedure . . . . . . . . . . . ..223

DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1
(FRONT) (HIGH VOLTAGE). . . . . . . . . . 231

Component Description . . . . . . . . . . ...231
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 231
On Board Diagnosis Logic. . . . . . . . . ...231
Possible Cause. . . . . . . . . . . . . . 232
DTC Confirmation Procedure . . . . . . . . ..232
Wiring Diagram . . . . . . . . . . . . . . 233
Diagnostic Procedure . . . . . . . . . . . ..235

DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1
HEATER (FRONT). . . . . . . . . . . . . ...239

Description . . . . . . . . . . . . . . . ...239
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 239
On Board Diagnosis Logic. . . . . . . . . ...239

CONTENTS

(Cont’d)

EC-2